Because they feature HV compatibility, they can also be soldered directly to ESC battery terminals when using 2S batteries to achieve maximum RPM and cooling. Fan features 30x30mm Aluminum heatsink housing with carbon-fiber fan guard for extra protection. High-performance NHX RC 1/8 Twin Cyclone Aluminum HV Cooling Fans with Cover, 28000 RPM motor heatsink for superior RC motor cooling and durability. Deliver to Free Shipping Note: Motor shown is for illustration purpose only. For: 1/8 Motors with around 40.5 – 42.8mm diameter; 58mm length Fan Dimensions : 30x30x10mm Jet Engine Fan NHX 1/8 Twin Cyclone Alum HV Cooling Fans W/Cover 28000 RPM Motor Heatsink Red Arrma Rc Cars Features: For: 1/8 Motors with around 40.5 � 42.8mm diameter; 58mm length Material: Aluminum Heatsink including Fan housing Input Voltage: 6.0-8.4v Fan Dimensions : 30x30x10mm Fan Max Speed: 28000 RPM Fan Covers: Durable twin carbon-fiber fan guard for extra protection Wires: Silicone wires with 240mm JST-Y Splitter with servo connecter Color: Red Weight : 2 oz. A handy 240mm extension is simple to install by plugging directly into your receiver where it operates off BEC voltage. This is the New NHX 1/8 Cyclone Dual High Voltage, High Speed 28000 RPM Fan with Clip-on Heatsink.